对于给定的异常堆栈,如何获得根异常(比如说是UnknownHostException)?
[java] org.codehaus.xfire.XFireRuntimeException: Could not invoke service.. Nested exception is org.codehaus.xfire.fault.XFireFault: Couldn't send message.
[java] org.codehaus.xfire.fault.XFireFault: Couldn't send message.
[java] at org.codehaus.xfire.fault.XFireFault.createFault(XFireFault.java:89)
[java] at org.codehaus.xfire.handler.OutMessageSender.invoke(OutMessageSender.java:30)
[java] at org.codehaus.xfire.handler.HandlerPipeline.invoke(HandlerPipeline.java:131)
[java] at org.codehaus.xfire.client.Invocation.invoke(Invocation.java:79)
[java] at org.codehaus.xfire.client.Invocation.invoke(Invocation.java:114)
[java] at org.codehaus.xfire.client.Client.invoke(Client.java:336)
[java] at org.codehaus.xfire.client.XFireProxy.handleRequest(XFireProxy.java:77)
[java] at org.codehaus.xfire.client.XFireProxy.invoke(XFireProxy.java:57)
[java] at $Proxy12.findICPInfoToObject(Unknown Source)
[java] at com.sinoi.icp.impl.ICPInfoFinderImpl.findByDomainName(Unknown Source)
[java] at com.sinoi.icp.IcpFinderDemo.main(Unknown Source)
[java] Caused by: org.codehaus.xfire.XFireException: Couldn't send message.
[java] at org.codehaus.xfire.transport.http.HttpChannel.sendViaClient(HttpChannel.java:145)
[java] at org.codehaus.xfire.transport.http.HttpChannel.send(HttpChannel.java:48)
[java] at org.codehaus.xfire.handler.OutMessageSender.invoke(OutMessageSender.java:26)
[java] ... 9 more
[java] Caused by: java.net.UnknownHostException: icpinfo.137.300.cn
[java] at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:195)
[java] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
[java] at java.net.Socket.connect(Socket.java:529)
[java] at java.net.Socket.connect(Socket.java:478)
[java] at java.net.Socket.<init>(Socket.java:375)
[java] at java.net.Socket.<init>(Socket.java:249)
[java] at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
[java]
[java] at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:122)
[java]
[java] at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
答案 0 :(得分:16)
以下是一种示例方法:
public static Throwable getRoot(Throwable t) {
Throwable result = t;
while (result.getCause() != null) {
result = result.getCause();
}
return result;
}
答案 1 :(得分:2)
您可以尝试捕获异常并执行:
e.getCause();